Cryptic numbers? No, its the price of petrol a year, a month, a day ago, and then today. You’d almost think that petrol rationing was about to start.

Riding to work this morning there’s chaos at the first petrol station — still $1.25/litre — and motorists queueing at all the pumps and out onto the road. Then ride up to the corner of North and Clayton roads where, bizarrely, the two outlet that face each other often have wildly different prices. Sure enough, its$1.25 at one of them and \$1.39 at the other! Even more bizarrely, there are motorists filling their tanks at both… I wonder what the price will be in a week, a month, a year?